Shortness of breath has many different causes.
[LIST][*]A blockage of the air passages in your nose, mouth, or throat may lead to difficulty breathing.[*]Heart disease can cause breathlessness if your heart is unable to pump enough blood to supply oxygen to your body. If your brain, muscles, or other body organs do not receive enough oxygen, a sense of breathlessness may occur.[*]Sometimes emotional distress, such as anxiety, can lead to difficulty breathing.[/LIST]